(BPT) - If you are one of the millions of Americans with chronic heartburn, the American Society for Gastrointestinal Endoscopy (ASGE) wants you to think differently about your condition. It may indicate something far more serious - changes in the cells lining your esophagus that could lead to a common form of esophageal cancer, one of the most rapidly growing cancers in the U.S. Even if you take medication for your heartburn symptoms, disease can still develop.